Grill brush



FIG. 1 is a perspective view of a grill brush in accordance with the present design;

FIG. 2 is a right side elevational view thereof, the left side elevational view being a mirror image thereof;

FIG. 3 is a front side elevational view thereof;

FIG. 4 is a rear side elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines shown in the drawings illustrate portions of the grill brush that form no part of the claimed design. 

CLAIM The ornamental design for a grill brush, as shown and described. 